Download Dynomation-5 User Manual Update For Program

and other engine parameters can affect the fuel retained and lost from each
cylinder throughout the rpm range. This new data is displayed in both tables and
graphs:
• Trapped Mass: Total Charge Mass retained in each cylinder at the end of
the intake cycle, measured at each rpm point in Pounds or Grams.
• Lost Charge Mass (Displayed on Pro PrintOut only): Total Charge Mass that
entered each cylinder but then escaped through reversion flow back into
the intake tract and/or discharged with exhaust flow before the end of the
exhaust and intake cycles, measured at each rpm point in Pounds or Grams.
• Percentage Of Charge Lost To Reversion: Percentage of Total Charge Mass
that entered each cylinder but then escaped in reversion flow back into the
intake tract, measured at each rpm point.
• Percentage Of Charge Lost To Exhaust Flow: Percentage of Total Charge Mass
that entered each cylinder but then escaped with exhaust flow, measured at
each rpm point.
• Percentage Of Charge Spoiled By Exhaust Gasses: Percentage of Total Charge
Mass “spoiled” by exhaust gasses that moved into the cylinder (rather than
out) during the exhaust valve event, measured at each rpm point.
• BSFC (Brake Specific Fuel Consumption): A standard measure of the fuel used
by the engine during a specific time period to produce a known (brake)
power level, measured at each rpm point in Pounds-per-Horsepower-Hour or
Grams-per-Kilowatt-Hour.
• Fuel Flow Rate: A standard measure of fuel consumption during a specific
time period, measured throughout the rpm range in Pounds-per-Hour or
Grams-per-Hour.
• Fuel Conversion Efficiency (Shown only in ProTools Table; not displayed on
Pro PrintOut): A standard percentage measure of the efficiency at which
fuel energy is converted into usable power output, measured at each rpm
point.
These mass flow measurements are calculated during every Wave-Action simulation
and are displayed in the tables (Standard and ProTools Tables). These new
measurements also can be plotted on the top-right (rpm-based) graph by rightclicking the graph and assigning the Y1 (normally Power) and/or Y2 (normally
Torque) to any Charge-Mass variable. Particularly powerful and easy to interpret
are the Percentage Flow values (Lost to Reversion, Lost to Exhaust, and Spoilage
Flow). Percentage charge flows clearly show where charge flow inefficiencies occur
in any engine design.
For example, if you are simulating an engine primarily for optimum power, an
overall design that limits reversion flow will maintain higher charge density in
the cylinder. If charge is allowed to “revert” into the intake track, it will
not be available to produce power during the following combustion and power
stroke events. Reversion flow into the intake typically occurs at the end of
the intake valve event, when the piston is moving up the bore and the intake